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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi MM3Z9V1C

Name: MM3Z9V1C
Brand: onsemi
SKU: MM3Z9V1C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MM3Z9V1C

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SC-90, SOD-323F

Datasheet:: MM3Z9V1C.pdf

Description:: DIODE ZENER 9.1V 200MW SOD323F

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MM3Z9V1C from onsemi is a 9.1 V ±5% Zener diode in SOD−323FL package, rated for 200 mW power dissipation, 14 Ω zener impedance at 5 mA test current, and 0.45 µA reverse leakage at 6 V. It provides precision voltage regulation in low-power biasing and reference circuits.

For engineers reviewing the MM3Z9V1C datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal resistance (595 °C/W), junction temperature limit (150 °C), and SOD−323FL footprint compatibility with space-constrained PCB layouts.

Technical Context

The MM3Z9V1C operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable output voltage under varying load and input conditions. Its zener voltage is specified at 9.1 V nominal with ±5% tolerance, tested under 10 ms pulse conditions.

It exhibits 14 Ω dynamic impedance at I_ZT = 5 mA and 94 Ω at I_ZK = 1 mA, supporting both regulation and low-current sensing roles. Reverse leakage remains below 0.45 µA at VR = 6 V, enabling use in ultra-low-power standby circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	8.65 V min / 9.1 V typ / 9.56 V max - defines regulation setpoint with ±5% tolerance at I_ZT = 5 mA
Zener Impedance (Z_ZT)	14 Ω max - ensures minimal output voltage variation under small-signal AC load changes
Power Dissipation (P_D)	200 mW - limits continuous DC power handling; derates above 25 °C ambient per R_JA = 595 °C/W
Reverse Leakage (I_R)	0.45 µA max at V_R = 6 V - enables use in battery-backed or energy-harvesting circuits where quiescent current matters
Junction Temperature (T_J)	150 °C max - sets upper thermal operating limit for reliability in enclosed or high-ambient environments
Package	SOD−323FL - 1.7 mm × 1.25 mm × 0.95 mm surface-mount outline with matte tin finish and Pb-free/RoHS compliance

Pinout & Package

SOD−323FL is a two-terminal surface-mount package with cathode-marked anode-cathode orientation. The device has no internal circuitry beyond the PN junction; terminals serve only as anode and cathode connections.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Forward conduction terminal	Connected to lower-potential node during forward bias; tied to ground or reference rail in shunt regulator configuration
2 (Cathode)	Reverse breakdown terminal	Connected to higher-potential node; carries regulated output voltage when reverse-biased above V_Z

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables predictable regulation without post-production trimming in cost-sensitive consumer and industrial designs
200 mW power rating	Supports stable operation in low-current bias networks (e.g., op-amp references, microcontroller reset circuits)
SOD−323FL footprint	Reduces board area by >40% vs. SOD-123 while maintaining solderability and reflow compatibility
14 Ω dynamic impedance	Minimizes output voltage deviation under 1–10 mA load transients in analog sensor signal conditioning

Applications

Low-Power Voltage Reference	Microcontroller Reset Circuit
Use Scenario: Providing stable 9.1 V reference for ADC calibration or comparator threshold in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise analog reference point independent of supply rail variation. Use Value: Maintains <±1% reference accuracy over temperature due to tight 9.1 V ±5% tolerance and low 14 Ω Z_ZT.	Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during power-up and brown-out events. IC Role / Device Role / Timing Role: Zener-clamped voltage divider defining reset threshold voltage at MCU's nRST pin. Use Value: Ensures reliable reset assertion at 9.1 V ±5%, with sub-µA leakage preserving battery life in sleep mode.
ESD-Protected Signal Clamp	Current-Limited Bias Network
Use Scenario: Protecting RS-485 receiver inputs against transient overvoltage in factory automation interfaces. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting line voltage to 9.1 V during ESD or surge events. Use Value: Delivers 0.45 µA leakage at 6 V, minimizing signal distortion while clamping fast transients via 14 Ω Z_ZT.	Use Scenario: Biasing photodiode amplifier in optical smoke detector with fixed 9.1 V node. IC Role / Device Role / Timing Role: Passive current-limited voltage source setting photodiode reverse bias voltage. Use Value: Provides stable 9.1 V bias with <10 mV ripple under 100 µA load, enabled by 200 mW rating and low Z_ZT.

Low-Power Voltage Reference

Microcontroller Reset Circuit

Use Scenario: Providing stable 9.1 V reference for ADC calibration or comparator threshold in battery-powered IoT sensors.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise analog reference point independent of supply rail variation.

Use Value: Maintains <±1% reference accuracy over temperature due to tight 9.1 V ±5% tolerance and low 14 Ω Z_ZT.

Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during power-up and brown-out events.

IC Role / Device Role / Timing Role: Zener-clamped voltage divider defining reset threshold voltage at MCU's nRST pin.

Use Value: Ensures reliable reset assertion at 9.1 V ±5%, with sub-µA leakage preserving battery life in sleep mode.

ESD-Protected Signal Clamp

Current-Limited Bias Network

Use Scenario: Protecting RS-485 receiver inputs against transient overvoltage in factory automation interfaces.

IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting line voltage to 9.1 V during ESD or surge events.

Use Value: Delivers 0.45 µA leakage at 6 V, minimizing signal distortion while clamping fast transients via 14 Ω Z_ZT.

Use Scenario: Biasing photodiode amplifier in optical smoke detector with fixed 9.1 V node.

IC Role / Device Role / Timing Role: Passive current-limited voltage source setting photodiode reverse bias voltage.

Use Value: Provides stable 9.1 V bias with <10 mV ripple under 100 µA load, enabled by 200 mW rating and low Z_ZT.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B9V1	Same 9.1 V ±5% rating but in SOD-323 package (not FL variant); R_JA = 625 °C/W; 250 mW rating	Marginally higher power handling but slightly worse thermal performance; identical footprint except land pattern tolerances	Select when higher P_D margin is needed and board layout allows minor pad adjustment
MMSZ5240B	9.1 V ±5% in SOD-123; 500 mW rating; R_JA = 350 °C/W; Z_ZT = 15 Ω at 20 mA	Larger footprint and higher power capability; suited for higher-current regulation where SOD-323FL space constraints don't apply	Select when thermal management is critical and PCB area permits larger package

Compared with BZX384-B9V1 and MMSZ5240B, the MM3Z9V1C offers the smallest footprint (SOD−323FL) and lowest profile (0.95 mm height), making it optimal for ultra-thin portable electronics where board space and component height are constrained.

Availability

MM3Z9V1C is available at Aetrix Electronics and suitable for low-power voltage reference, microcontroller reset circuitry, ESD-protected signal clamping, and current-limited bias network applications requiring stable component supply and RoHS-compliant sourcing.

Supply support for MM3Z9V1C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MM3Z series is part of onsemi's precision Zener diode portfolio designed specifically for compact, high-reliability voltage regulation in space-constrained and low-power electronic systems.

FAQ

What is the zener voltage tolerance of MM3Z9V1C?

The MM3Z9V1C has a zener voltage tolerance of ±5% around its nominal 9.1 V rating, meaning the actual measured V_Z falls between 8.65 V and 9.56 V at I_ZT = 5 mA. This tolerance is guaranteed per onsemi's Rev. 3 datasheet and applies across the full operating temperature range when tested under standard pulse conditions.

Can MM3Z9V1C be used in place of MM3Z9V1B?

No - MM3Z9V1C and MM3Z9V1B are distinct variants: the "C" suffix denotes ±5% tolerance, while "B" indicates ±2% tolerance. Their electrical specifications differ in V_Z spread and Z_ZT, and they are not interchangeable without design validation. The MM3Z9V1C must be selected only when ±5% tolerance meets system requirements.

What is the maximum reverse leakage current for MM3Z9V1C?

The MM3Z9V1C specifies a maximum reverse leakage current (I_R) of 0.45 µA at V_R = 6 V and T_A = 25 °C. This value is confirmed in the Electrical Characteristics table of the official onsemi datasheet and reflects the device's suitability for ultra-low-quiescent-current applications such as battery-backed memory retention or sensor biasing.

Does MM3Z9V1C require a heatsink in typical operation?

No - the MM3Z9V1C does not require an external heatsink under typical conditions. With a 200 mW power rating and R_JA = 595 °C/W, it can safely dissipate up to ~140 mW at 25 °C ambient on a standard PCB. Heatsinking is unnecessary unless continuous power exceeds 100 mW in high-temperature enclosures (>70 °C ambient).

Is MM3Z9V1C compatible with lead-free reflow soldering processes?

Yes - the MM3Z9V1C features a matte tin (Sn) finish and is explicitly labeled Pb-free and RoHS compliant in the onsemi datasheet. It is qualified for standard lead-free reflow profiles (J-STD-020, peak temperature ≤ 260 °C), with no special prebake or moisture sensitivity requirements (MSL1).

MM3Z9V1C Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-90, SOD-323F

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 9.1 V

Tolerance:: ±5%

Power - Max:: 200 mW

Impedance (Max) (Zzt):: 14 Ohms

Current - Reverse Leakage @ Vr:: 450 nA @ 6 V

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323F

MM3Z9V1C FAQ

1.How can I place an order for MM3Z9V1C through Aetrix?

Please submit a Request for Quotation (RFQ) for MM3Z9V1C on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MM3Z9V1C reliable?

The price and inventory of MM3Z9V1C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z9V1C is usually 5 days.

3.What payment methods are accepted for MM3Z9V1C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z9V1C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MM3Z9V1C?

MM3Z9V1C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MM3Z9V1C order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MM3Z9V1C?

For technical support, including MM3Z9V1C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z9V1C requirements.

6.How does Aetrix verify that MM3Z9V1C is sourced from the original manufacturer or authorized distributors?

All MM3Z9V1C products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MM3Z9V1C meets industry standards.

7.What is the process for return or replacement of MM3Z9V1C?

All MM3Z9V1C units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z9V1C, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MM3Z9V1C part is unused and in its original packaging.

Return procedure for MM3Z9V1C:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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